I figured out the quotes!
Anyways, I recently saw a Curse of Strahd coffin shaped box at a gaming store. Can you please explain what this comes with? What is the benefit of buying it? Or is the book perfectly sufficient?
Btw, so far I have bought the Essential Kit, the Starter Kit, the Expanded Rules alt art set, and the Stranger Things Starter Kit. I have yet to play any of them though.
These responses are great, everyone! Thank you very much for the advice and information.
You have a lot of things to start:
1) Run a nice adventure using both the Starter set and the Essentials combined
2) Create your characters using the Basic Rules, the SRD and the Essentials rules booklet, and adding stuff from Xanathar, Tasha and Mordenkainen
3) Use the DM's rules in Xanathar and Tasha (some rules references to the DM's book you don't have, but for your style of play it may not be needed)
4) Create your adventures using the Basic rules and Mordenkainen Monsters.
What you don't have are:
1) Advanced creation rules (multiclassing, some classes, some high level spells, all the features)
2) Treasure from DMs book
3) Monsters from, well, monster book
If you want to run a higher level game but still you don't want to buy the entire trio, consider dndbeyond, where you can buy indivual spells, trasure and monster description. They aren't cheap if you buy them a lot, but if you are running something and need four or five of these things, it may be the right solution (probably this means running adventures from DMGuilds and not a book, as they really lean a lot on the core trio). Consider, if you want, to buy using the coupon inside the essentials kit the PHB on dndbeyond.
Then, if the game still pleases you, in 2024 there will be the new books available!